Django url change language code

Question

I am trying to change the language of the website when users click a button in Django.

I have a base project and the urls are:

urlpatterns += i18n_patterns(
    # Ecommerce is the app where I want to change the language
    url(r'^', include("ecommerce.urls")),
)

The url inside Ecommerce.urls is:

urlpatterns = [
    url(r'^testing/$', views.test, name='url_testing'),
    ... other urls
]

When I visit the url above, I first go to: http://localhost/en/testing/.

I want to set a link <a href="{% url 'url_testing' %}">Change Language</a> so that when users click it, it will change language to http://localhost/zh-hans/testing/. How do I do this in my template?

EDIT

I can now change the language using the following code but the problem is that it only works once:

<form id="languageForm" action="/i18n/setlang/" method="post">
    {% csrf_token %}
    <input name="next" type="hidden" value="{% url 'url_testing' %}" /> 
    <input id="newLanguageInput" type="hidden" name="language"/>
</form>

And my links are:

<li><a onclick="changeLanguage('zh-hans')">简体</a></li>
<li><a onclick="changeLanguage('zh-hant')">繁體</a></li>

The function changeLanguage is defined like:

function changeLanguage(newLanguage) {
    $('input[name="newLanguageInput"]').val(newLanguage);
    $('#languageForm').submit();
}

The code works when I first click any of the 2 links, and I will be redirected to the url http://localhost/zh-hans/testing/ or http://localhost/zh-hant/testing/. The problem is after I change the language once, it no longer changes. Is there something wrong with my submit?

Answer 1

Actually it's not going to be a simple <a> link but a <form>.

Have a read on how to set_language redirect view. This form will be responsible for changing languages. It's easy as a pie.

Make sure you have set some LANGUAGES first.